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基于物联网技术的UPS系统调度自动化性能分析

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通信电源技术 2024年第4期41卷 134-136页

作者：袁媛崔保飞国网山东省电力公司博兴县供电公司山东滨州256500

以物联网技术为基础,全面分析不间断电源(Uninterruptable Power Supply,UPS)系统调度自动化性能。通过引入先进的传感器网络,优化数据采集与传输过程,以实现智能负载管理和故障自愈的自动化调度系统,提高UPS电源系统的效能和可靠性。同... 详细信息

以物联网技术为基础,全面分析不间断电源(Uninterruptable Power Supply,UPS)系统调度自动化性能。通过引入先进的传感器网络,优化数据采集与传输过程,以实现智能负载管理和故障自愈的自动化调度系统,提高UPS电源系统的效能和可靠性。同时,深入研究系统在不同工作负载下的性能结果,评估物联网技术在UPS电源系统中的应用表现。研究结果为未来UPS电源系统的改进和优化提供了参考,能够满足电力系统日益增长的需求,提升系统的自动调度性能。

关键词：物联网技术不间断电源(UPS)系统调度自动化性能分析

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航空齿轮内花键热处理精度控制技术研究

现代制造技术与装备 2024年第3期60卷 180-182页

作者：崔雪莹徐锋南京航空航天大学南京210000 中国航发哈尔滨东安发动机有限公司哈尔滨150066

文章针对航空齿轮内花键热处理精度控制展开研究,提出新的技术方法和加工手段,保证内花键的精度能满足未来航空产品的发展需要,提高热处理内花键的加工稳定性和精度,对航空齿轮内花键产品的试制具有重大意义。

关键词：航空齿轮内花键热处理精度控制

基于GEE平台的水稻种植范围识别研究--以黑龙江省为例

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测绘地理信息 2024年第3期49卷 101-106页

作者：潘建平安新永崔伟尚栋谢鹏重庆交通大学智慧城市学院重庆400074

精准识别与提取水稻种植范围对于粮食估产和耕地有效利用具有重要价值。以往的研究针对于单一的关键物候期进行水稻的识别,导致水稻与某些地物在单一时相中光谱可区分性较差。以黑龙江省为研究区,在谷歌地球引擎(google earth engine,G... 详细信息

精准识别与提取水稻种植范围对于粮食估产和耕地有效利用具有重要价值。以往的研究针对于单一的关键物候期进行水稻的识别,导致水稻与某些地物在单一时相中光谱可区分性较差。以黑龙江省为研究区,在谷歌地球引擎(google earth engine,GEE)云平台的支持下,利用哨兵二号(sentinel-2 MSI)数据,使用单类支持向量机(one-class sup⁃port vector machine,OCSVM)对水稻进行了种植范围遥感识别提取,设计了一种基于像元的融合物候特征识别算法,首先对于研究区内的水稻进行时序性分析,通过建立4个关键物候期;然后对水稻和研究区内的其他地物进行物候特征的择优选择;最后将所选的物候特征融合进行水稻种植范围提取。结果表明,该方法的结果精度与实地调查数据相比总体精度(overall accuracy,OA)为0.969,Kappa为0.93。

关键词：水稻物候特征哨兵二号单类支持向量机谷歌地球引擎

An element decomposition method with variance strain stabilization

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Science China(Physics,Mechanics & Astronomy) 2015年第7期58卷 57-66页

作者： cui xiangYang LIU PengWei LI GuangYao State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan University

An element decomposition method with variance strain stabilization(EDM-VSS) is proposed. In the present EDM-VSS, the quadrilateral element is first divided into four sub-triangular cells, and the local strains in sub-triangular cells are obtained using linear interpolation function. For each quadrilateral element, the strain of the whole quadrilateral is the weighted average value of the local strains, which means only one integration point is adopted to construct the stiffness matrix. The stabilization item of the stiffness matrix is constructed by variance of the local strains, which can eliminate the instability of the one-point integration formulation and largely increase the accuracy of the element. Compared with conventional full integration quadrilateral element, the EDM-VSS achieves more accurate results and expends much lower computational cost. More importantly, as no mapping or coordinate transformation is involved in the present EDM-VSS, the restriction on the conventional quadrilateral elements can be removed and problem domain can be discretized in more flexible ways. To verify the accuracy and stability of the present formulation, a number of numerical examples are studied to demonstrate the efficiency of the present EDM-VSS.

关键词： numerical methods element decomposition method variance strain stabilization one-point integration quadrilateralelement

Effect of periphyton community structure on heavy metal accumulation in mystery snail(Cipangopaludina chinensis):A case study of the Bai River,China

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Journal of Environmental Sciences 2012年第10期24卷 1723-1730页

作者： Jingguo cui Baoqing Shan Wenzhong Tang State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-environmental SciencesChinese Academy of ScieneesBeijing 100085China

The ratio of metal：P stoichiometry was used to identify the accumulation pathways of heavy metals （V, Cr, Co, Ni, Cu, Cd, and Pb） from periphyton to snails Cipangopaludina chinensis Gray （C. chinensis） in the Bai River watershed. The results showed that periphyton communities were mainly composed of two types of algae, filamentous green algae and unicellular diatoms. The proportion of unicellular diatoms in the periphyton community is a key factor that influences metal accumulation in C. chinensis. The V, Cr, Co, Ni, and Cd content of C. chinensis increased steadily as the corresponding metal content of periphyton increased, but Cu and Pb in the snail did not increase in the periphyton. Mechanisms of V, Cr, and Ni accumulation were found to be related to the proportion of diatoms, while Cd and Pb accumulation were dependent on the physiological characteristics of C. chinensis. The accumulation of Cu in C. chinensis was closely related to their grazing behavior. The metal：P stoichiometry revealed that Cr, Ni, and Cd can reduce the potential ecological risks associated with increased P inputs to the ecosystem. V and Co were considered to be relatively safe, regardless of the periphyton P content. Finally, Pb may not be prone to transfer to higher trophic levels, and may pose the lowest ecological risks of the studied heavy metals, but Cu can cause potential ecological risks when eutrophication has occurred.

关键词： heavy metal metal:P periphyton Chinese mystery snails Cipangopaludina chinensis

Multi-Model Based PSO Method for Burden Distribution Matrix Optimization With Expected Burden Distribution Output Behaviors

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IEEE/CAA Journal of Automatica Sinica 2019年第6期6卷 1506-1512页

作者： Yong Zhang Ping Zhou Guimei cui State Key Laboratory of Synthetical Automation for Process Industries Northeastern UniversityShenyang 110819and also with the School of Information EngineeringInner Mongolia University of Science and TechnologyBaotou 014010China State Key Laboratory of Synthetical Automation for Process Industries Northeastern UniversityShenyang 110819China School of Information Engineering Inner Mongolia University of Science and TechnologyBaotou 014010China

Burden distribution is one of the most important operations, and also an important upper regulation in blast furnace(BF) iron-making process. Burden distribution output behaviors(BDOB) at the throat of BF is a 3-dimensional spatial distribution produced by burden distribution matrix(BDM),including burden surface output shape(BSOS) and material layer initial thickness distribution(MLITD). Due to the lack of effective model to describe the complex input-output relations,BDM optimization and adjustment is carried out by experienced foremen. Focusing on this practical challenge, this work studies complex burden distribution input-output relations, and gives a description of expected MLITD under specific integral constraint on the basis of engineering practice. Furthermore, according to the decision variables in different number fields, this work studies optimization of BDM with expected MLITD, and proposes a multi-mode based particle swarm optimization(PSO) procedure for optimization of decision variables. Finally, experiments using industrial data show that the proposed model is effective, and optimized BDM calculated by this multi-model based PSO method can be used for expected distribution tracking.

关键词： Blast furnace burden distribution burden distribution matrix(BDM) burden distribution output behaviors(BDOB) distributed parameter system particle swarm optimization(PSO)

Large-scale gene expression reveals different adaptations of hyalopterus persikonus to winter and summer host plants

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Insect Science 2017年第3期24卷 431-442页

作者： Na cui Peng-Cheng Yang Kun Guo Le Kang Feng cui State Key Laboratory of Integrated Management of Pest Insects & Rodents Institute of Zoology Chinese Academy of Sciences Beijing 100101 Beijing Institutes of Life Science Chinese Academy of Sciences Beijing 100101 Institute of Medicinal Plant Development Chinese Academy of Medical Sciences Peking Union Medical College Beijing 100193 University of Chinese Academy of Sciences Being 100049 China

host alternation, an obligatory seasonal shifting between host plants of distant genetic relationship, has had significant consequences for the diversification and success of the superfamily of aphids. however, the underlying molecular mechanism remains unclear. In this study, the molecular mechanism of host alternation was explored through a large-scale gene expression analysis of the mealy aphid hyalopterus persikonus on winter and summer host plants. More than four times as many unigenes of the mealy aphid were significantly upregulated on summer host Phragmites australis than on winter host Rosaceae plants. In order to identify gene candidates related to host alternation, the differentially expressed unigenes of h. persikonus were compared to salivary gland expressed genes and secretome of Acyrthosiphon pisum. Genes involved in ribosome and oxidative phosphorylation and with molecular functions of heme-copper terminal oxidase activity, hydrolase activity and ribosome binding were potentially upregulated in salivary glands of//. persikonus on the summer host. Putative secretory proteins, such as detoxification enzymes （carboxylesterases and cytochrome P450s）, antioxidant enzymes （peroxidase and superoxide dismutase）, glutathione peroxidase, glucose dehydrogenase, angiotensin-converting enzyme, eadherin, and calreticulin, were highly expressed in h. persikonus on the summer host, while a SCP GAPR-I-like family protein and a salivary sheath protein were highly expressed in the aphids on winter hosts. These results shed light on phenotypic plasticity in host utilization and seasonal adaptation of aphids.

关键词： aphid host alternation parasite-host interaction phenotypic plasticity salivary gland transcriptome

城市平均通勤时间统计测算模型及错峰间隔优化选择

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数理统计与管理 2024年第4期43卷 605-621页

作者：郑梦沂刘黎明崔江龙苏铎中国政法大学社会学院北京102249 首都经济贸易大学统计学院北京100070 中国环境科学院研究所北京100012 中国科学院大学计算机学院北京100080

本文研究了错峰上下班对城市通勤时间的影响,通过设计拟合通勤路程分布和行驶速度函数,建立了平均通勤时间的统计测算模型,并采用逆向求解算法得出不同错峰间隔下的平均通勤时间的解析表达式。最终构建了基于交通资源可承受流量的错峰... 详细信息

本文研究了错峰上下班对城市通勤时间的影响,通过设计拟合通勤路程分布和行驶速度函数,建立了平均通勤时间的统计测算模型,并采用逆向求解算法得出不同错峰间隔下的平均通勤时间的解析表达式。最终构建了基于交通资源可承受流量的错峰间隔优化选择模型,实现了针对北京市的测算和分析。本文提出的思路、模型、方法和结论具有通用性,可为缓解城市交通拥堵提供有效方法。

关键词：错峰上下班平均通勤时间累计人流量函数通勤路程分布函数交通拥堵指数

Social media and mobility landscape:Uncovering spatial patterns of urban human mobility with multi source data

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Frontiers of Environmental Science & Engineering 2018年第5期12卷 101-114页

作者： Yilan cui xing xie Yi Liu School of Environment Tsinghua UniversityBeijing 100084China Microsoft Research Asia Microsoft CorporationBeijing 100080China

In this paper,we present a three-step methodological framework,including location identification,bias modification,and out-of-sample validation,so as to promote human mobility analysis with social media *** specifically,we propose ways of identifying personal activity-specific places and commuting patterns in Beijing,China,based on Weibo(China’s Twitter)check-in records,as well as modifying sample bias of check-in data with population synthesis *** independent citywide travel logistic survey is used as the benchmark for validating the *** differences are discerned from Weibo users’and survey respondents’activity-mobility patterns,while there is a large variation of population representativeness between data from the two *** bias modification,the similarity coefficient between commuting distance distributions of Weibo data and survey observations increases substantially from 23% to 63%.Synthetic data proves to be a satisfactory costeffective alternative source of mobility *** proposed framework can inform many applications related to human mobility,ranging from transportation,through urban planning to transport emission modeling.

关键词： Social media human mobility Population bias Sample reconstruction Data integration